In addition to dating the two women (who were unaware of each other until recently) prior to leaving for the show's production, Swiderski also allegedly slept with both women when he returned home to Chicago after telling Harris he had to quit the show to save his job and then even continued attempting to sleep with them -- successfully in one case -- when he returned home after proposing to Harris at The Bachelorette's final Rose Ceremony.

"I feel gross, used and completely violated. It shocks me that he was able to do something like that to me," former girlfriend Lindsey Johnson told Us Weekly in a cover story published in the magazine's August 17 issue.

According to Johnson, Swiderski slept with her on June 4 -- more than a week after The Bachelorette's final Rose Ceremony was filmed in Hawaii.

The next day Swiderski attempted to sleep with Bethany Steffen, the other woman he was allegedly dating, by sending her a text message in which he told her to "bring beer and condoms" to his apartment, Steffen told Us Weekly.

"Ed's not worth my time, but if I can help someone avoid heartbreak, I'm gonna do that," Steffen said.

According to Us Weekly, Swiderski told both women he was going on "a business trip in Texas" when decided to return to The Bachelorette and ask Harris to let him rejoin the show.

Swiderski's claim that he had to leave the show to avoid losing his job as a technology consultant for Microsoft was also a lie, according to the magazine.

"Lindsey and I are both smart girls, and Ed just has this way of making people believe what he wants. Jillian needs to be careful," Steffen told Us Weekly.